civil rights groups pushing back against voter id laws. >> the effort to change the rules of the game at the last minute is a really misguided effort. >> reporter: wednesdndy wiser s hundreds of voters may not have the right id. the elderly, college students, poor people, blacks and latinos. groups that traditionally vote democratic. >> we have to make sure there is no fraud in our elections. we should not pass laws that are unnecessary that exclude people from participating equally in our democracy. >> reporter: the new voter id laws protect against voter impersonation. it's a problem, says john fun, an expert on the subject. >> if someone walks in and votes in the name of a dead person, they don't have to show id, how likely is that dead person to intervene? >> reporter: the justice department or state and federal courts have block td this in three states. texas, wisconsin, south carolina, which is currently appealing. pennsylvania is pending. alabama and mississippi need the green light from the justice department. of the eight, only tennessee and kansas voters have to meet the tou